Adjustable pedal crank hub for bicycle frames



July 8, 1952 H. CONNOLLY 2,602,677

ADJUSTABLE PEDAL CRANK HUB FOR BICYCLE FRAMES 2 SHEETSSHEET 1 Filed Aug. 5, 1948 Howard Connolly 1N VEN TOR.

y 8, 195:2 H. CONNOLLY 2,602,677

ADJUSTABLE PEDAL CRANK HUB FOR BICYCLE FRAMES Filed Aug. 5, 1948 2 SHEETSSHEET 2 Howard Connolly JNVENTOR.

Mao/Eat WWW fiMr Patented July 8, 1952 BICYCLE FRAMES I Howard Connolly, Deming, N. Mex.; Frances L. "Connolly ,,administratrix of said Howardwcon- I nolly,'deceased, assignor to Frances L. 0011- 'nolly, Deming, N. Mex. a

nection betweenthe pedal 'crank'hub and the driving wheel of the bicycle will be substantially taut at all times during variouspositions of the hub. j I V.

A further object of the presentfinvention is to provide van adjustable pedal crank hub for a bi cycle frame that is quickly andrefa'dily applied to or removed from a bicycle frame in a convenient manner and which is-applicabl for all types of bicycle frames which may or may not include a cross bar or horizontal bard e A still further aim of the present invention is to provide an adjustable support for pedal crank hubs of the aforementioned character that is simple and practical in construction, strong and reliable in use, small and compact in structure, neat and attractive in appearance, relatively inexpensive to manufacture, and otherwise well adapted for the purposesfor which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a fragmentary side elevational view of a bicycle and showing the present invention applied thereto, and with dotted lines showing alternate positions for the crank pedal hub;

Figure 2 is an enlarged fragmentary horizon tal sectional view taken substantially on the o1 a bicycle and showing the present invention in further modified form applied thereto;

Figure 5 is an enlarged fragmentary horizontal sectional view taken substantially in the direction of section line 5-5 of Figure 4; and,

" ,jApplication August 5, 1948, Serial No. 42,623" I fzolaims. (o1. 2so-2s1) Figure 61s a perspective viewofone-zportion of the follower that is used in conjunction with that embodiment of the invention illustrated in; Figures 4 and 5.

Referring now to the drawings in detail, and, more particularly to Figures 1 and-2,3whereinfor the purpose of illustration, there is disclosedjone embodiment of the present invention,--the numeral Ill represents a bicycle generally-including a frame I2 having an arcuate seat supDQrt: ing post or guide 14. v

Pivoted' to the upperportion 0f .the postl' l: is a rear forklfi the lower-free endsfof which support a rearaxle l8 that-receive the bearin portion 20 of a rear spoked wheel 22. Suitably .fixed to the wheel 22, is adriven sprocket 24 that will rotate withthe drivenwheel- Pivotally secured on the axlejor-bolt lii, are the bifurcated terminals 26 of ,asubstantia lly U-shaped member 28 from the web portionoft is -rigwhich there projects a rigid arm 3Q tha idly attached tova pedal crank hub 32.. 1 a

The axle portion' 34 of a pedal"crank.33;is rigtatably carried by thehub :32 and a drive sprocket 38 is fixed to axle portion 34. The sprockets 38 and 24 are connected by an endless drive chain 40 whereby upon a rotation of the pedal crank 34, the drive wheel 22 will berotated in a manner conventional for bicycle and tricycle structures. A block or follower member 42 is rigidly attached to the hub 32 and includes a concaved bearing face 44 that engages the guide l4. Internally threaded recesses are provided in the block 42 and register with suitable apertures provided in a complementary follower or block 46 having a concaved recess 48 that engages the guide [4. Bolts 50 extend through the apertures in the block 46 and receivably engage the internally threaded recesses provided in the block 42 for adjustment of the hub 32 on the guide [4.

It should be noted that the guide I4 is disposed in an arcuate path equidistant from the driven sprocket 24 so that the chain 40 will remain substantially taut throughout various peripheral adjustment of the hub 32.

Reference is now directed to Figure 3, wherein there is disclosed the present invention in slightly modified form. In this embodiment, all other parts being similar to that previously described, the blocks 42 and 46 are not employed and a crank pedal hub 52 is fixed to the arm 30 projecting from the U-shaped member 28.

The guide 54 in this embodiment is substantially straight and supports a plurality of spaced 3 auxiliary hubs 56 the longitudinal axes of which are spaced equidistant from the center of the driven sprocket 24.

In practical use of the present invention in modified form, and as illustrated in Figure 3, the crank pedal 34 is disposed in a selected one of the hubs 56 to retain the drive chain 40 substantially taut regardless of which of the hubs the crank pedal 34 is associated, see dotted lines of Figure 3.

Reference is next directed to Figures 4, 5 and 6, wherein there is disclosed the present invention in further modified form. In this embodiment, the numeral 58 represents 'a bicycle frame including a rear fork 59 that rotatably supports the axle 60 of a rear wheel 62.

A seat supporting post or guide 64 forms a portion of the frame 58 and includes an arcuate portion 66 that is disposed in a path equidistant from the axle 60.

The bifurcated terminals 68 of a substantially U-shaped member 10 are pivoted on the axle 66 and a rigid arm 12 projects from the web portion of the member 10 and supports a fixed block or follower member 14 having a concaved bearing surface 16 that engages the arcuate portion 66 of the guide 64.

Rigidly secured to the outer periphery of a pedal crank hub 18, is a further follower member or block 80 having a concaved recess 82 that receives the arcuate portion 66 of the guide 64.

Internally threaded recesses 84 provided in the block 80 oppose suitable apertures provided in the block I4 and receivably engage fasteners or bolts 84 that extend throughthe apertures in the block Having described the invention, what is claimed as new is:

1. In a bicycle including a seat supporting post having an arcuate portion, a rear wheel supporting fork, a rear axle. carried by said fork, a rear wheel'on said axle, a sprocket mountedon said axle, an elongated support" having forward and rear end portions, the rear'end portion of said support being bifurcated and pivoted on the axle, a pedal supporting hub secured to the forward end portion of said support and disposed transversely of said support, and forwardly of the periphery of said whee1,,a pedal crank mounted in said hub, a sprocket carried by said crank and connected to said first-mentioned sprocket, a follower composed of first and second halves, each of said halves having a concaved recess receiving said arcuate portion, one of said halves being fixed to the-hub, fasteners adjustably securing the halves together, and interconnecting means between said followerand said arcuate portion for retaining the follower adjusted onsaid arcuate portion. V

2."'The combination of claim' 1.. whereinfsaid arcuate portion is provided withfajplu'rality of:

spaced openings, each half of said follower have: ing projecting lugs selectively received in' said openings.

REFERENCES CITED j i i The following references areof recordiin the leof this patent: a -1 I HOWARD omets-1'1; I 

